spring异常---Got java.lang.NoClassDefFoundError while learning Spring framework

Got java.lang.NoClassDefFoundError while learning Spring framework

I've been searching for the reason why it failed for a long time, but couldn't figure it out.

The structure of files

src |__com.learn.spring.beans.annotation |   |__Main.java |   |__TestObject.java | |__beans.annotation.xml

Main.java

package com.learn.spring.beans.annotation;import org.springframework.context.ApplicationContext;import org.springframework.context.support.ClassPathXmlApplicationContext;public class Main {    public static void main(String[] args) {        ApplicationContext ctx = new ClassPathXmlApplicationContext("beans-annotation.xml");        TestObject to = (TestObject)ctx.getBean("testObject");        System.out.println(to);    }}

TestObject.java

package com.learn.spring.beans.annotation;import org.springframework.stereotype.Component;@Componentpublic class TestObject {}

beans-annotation.xml

<?xml version="1.0" encoding="UTF-8"?><beans xmlns="http://www.springframework.org/schema/beans"    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"    xmlns:context="http://www.springframework.org/schema/context"    xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd        http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.0.xsd">    <context:component-scan base-package="com.learn.spring.beans.annotation"></context:component-scan></beans>

I got the following error:

Picked up JAVA_TOOL_OPTIONS: -javaagent:/usr/share/java/jayatanaag.jar Sep 21, 2015 4:08:51 afternoon org.springframework.context.support.ClassPathXmlApplicationContext prepareRefreshINFO: Refreshing org.springframework.context.support.ClassPathXmlApplicationContext@1a6c5a9e: startup date [Mon Sep 21 16:08:51 CST 2015]; root of context hierarchySep 21, 2015 4:08:51 afternoon org.springframework.beans.factory.xml.XmlBeanDefinitionReader loadBeanDefinitionsINFO: Loading XML bean definitions from class path resource [beans-annotation.xml]Exception in thread "main" org.springframework.beans.factory.BeanDefinitionStoreException: Unexpected exception parsing XML document from class path resource [beans-annotation.xml]; nested exception is java.lang.NoClassDefFoundError: org/springframework/aop/TargetSource    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:414)    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:336)    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.loadBeanDefinitions(XmlBeanDefinitionReader.java:304)    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:181)    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:217)    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:188)    at org.springframework.beans.factory.support.AbstractBeanDefinitionReader.loadBeanDefinitions(AbstractBeanDefinitionReader.java:252)    at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:127)    at org.springframework.context.support.AbstractXmlApplicationContext.loadBeanDefinitions(AbstractXmlApplicationContext.java:93)    at org.springframework.context.support.AbstractRefreshableApplicationContext.refreshBeanFactory(AbstractRefreshableApplicationContext.java:129)    at org.springframework.context.support.AbstractApplicationContext.obtainFreshBeanFactory(AbstractApplicationContext.java:604)    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:509)    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)    at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:83)    at com.learn.spring.beans.annotation.Main.main(Main.java:13)Caused by: java.lang.NoClassDefFoundError: org/springframework/aop/TargetSource    at org.springframework.context.annotation.AnnotationConfigUtils.registerAnnotationConfigProcessors(AnnotationConfigUtils.java:154)    at org.springframework.context.annotation.ComponentScanBeanDefinitionParser.registerComponents(ComponentScanBeanDefinitionParser.java:150)    at org.springframework.context.annotation.ComponentScanBeanDefinitionParser.parse(ComponentScanBeanDefinitionParser.java:88)    at org.springframework.beans.factory.xml.NamespaceHandlerSupport.parse(NamespaceHandlerSupport.java:74)    at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDe

legate.java:1411)    at org.springframework.beans.factory.xml.BeanDefinitionParserDelegate.parseCustomElement(BeanDefinitionParserDelegate.java:1401)    at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.parseBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:168)    at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.doRegisterBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:138)    at org.springframework.beans.factory.xml.DefaultBeanDefinitionDocumentReader.registerBeanDefinitions(DefaultBeanDefinitionDocumentReader.java:94)    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.registerBeanDefinitions(XmlBeanDefinitionReader.java:508)    at org.springframework.beans.factory.xml.XmlBeanDefinitionReader.doLoadBeanDefinitions(XmlBeanDefinitionReader.java:392)    ... 14 moreCaused by: java.lang.ClassNotFoundException: org.springframework.aop.TargetSource    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)    ... 25 more

出现上述问题的原因其实很简单，我用了一下午调试，最终结果是缺少一个jar包，包名：spring-aop-4.0.0.RELEASE.jar。

呵呵，有点坑爹的感觉